low voltage
3990A640 REV C
OCT 2019
QAT Guide
Page 1
Auxiliary Products
QAT-TRDM – ELECTRONIC TIME SWITCH
Installation and Programming Guide
Technical Data
Parameter
Specification
Supply Voltage
230 V
RMS
50 Hz, 1Ph
Maximum Load Resistive (Geysers, under floor heating, lights)
21 A
Inductive (Pool pump, air conditioners)
10 A
Contact Endurance
20 000 (minimum) Operations
Degree of Ingress Protection (When installed in distribution panel)
IP40 (not waterproofed)
Operating Temperature
-20 °C to +55 °C
Single Segment Period
15 min.
Maximum Period for all Segments
96 x 15 min. Segments
Clock Accuracy
± 3 min. per month
Time Retention (Power Outage)
24 h
Figure 1: DB wiring
Figure 2: Stand alone wiring
Figure 3: Wiring a contactor for
loads greater than 21 A resistive or
10 A inductive
Load
L1
Time
Switch
N
L
Contactor
L
L2 L3 N
T1
N
T2T3
Supply
Coil
The programmable time switch can be used to automatically control pool pumps, lights,
geysers, etc.
General
Important Notes
1. During a power failure, the symbol is displayed and the time switch enters
standby. After a few hours, the display will turn off completely.
2. The time switch has a backup power feature which requires 1 hour to charge.
3. In the event of a power failure, a fully charged time switch will keep time for up to
24 hours.
The programmed schedule is always retained.
4. CBI advises that the time switch be installed by a suitably qualified electrician.
Installation
1. Isolate supply power before installing time switch.
2. Install the time switch on either mini rail or DIN rail (remove the escutcheon adapter for DIN).
3. Connect the time switch according to Figure 1 or Figure 2. Use a suitable contactor (Figure 3) if necessary to switch higher
current. Strictly obey markings for Line and Neutral poles.
4. Apply power and set the time and desired program schedule.
Load
Time
Switch
L
N
L
N
Supply
Neutral
Bar
Load
Time
Switch
L
N
L
N
Supply
